つつかく
tsutsumikakusu

Godan Verb (su)

1. to conceal; to keep secret; to cover up

Transitive
政治せいじが、インサイダー取引とりひきつつかくそうとした。
sējikaga insaidātorihikio tsutsumikakusōto shita.
The politician tried to cover up the insider trading.
Other forms: